Local Pairing and Antiferromagnetism in High-T(c) Superconductors

Abstract

The CuO2 planes in high-temperature superconductors are studied by a two-dimensional Hubbard Hamiltonian with a new proposed vacuum (d9p6). The superexchange between Cu sites and the hopping parameters of the carriers estimated in this new vacuum has good agreement with the experimental observation as well as numerical calculations with a finite cluster. Single carriers (electrons for n-type or holes for p-type) are localized due to the rigidity of the antiferromagnetic background. Local pairing in the CuO2 plane enables the paired states to move around without disturbing the antiferromagnetic background. The binding energy is estimated from the pair hopping energy, which causes the paired state to be lower in energy that the single carrier state. Keywords: High-Tc superconductors; Local pairing; Antiferromagnetism. (jhd)

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1989
Accession Number
ADA213004

Entities

People

  • H. R. Lee
  • Thomas F. George

Organizations

  • University at Buffalo

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Charge Carriers
  • Chemical Engineering
  • Chemistry
  • Crystal Structure
  • Energy Gaps
  • High Temperature
  • High Temperature Superconductors
  • Materials
  • Materials Science
  • Military Research
  • New York
  • Physics
  • Solid State Physics
  • Transition Temperature
  • Two Dimensional
  • United States

Fields of Study

  • Physics

Readers

  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.
  • Superconducting Magnet Technology

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene